Complete the first mission successfully

Successfully complete the second mission

Successfully complete the third mission

Collect all statics during the first mission

Collect all statics during the second mission

Collect all statics during the third mission

Collect all weapon improvements during the first mission

Collect all the weapon improvements in the second mission

Collect all the weapon improvements in the third mission

Open all the videos in the flashback gallery (prologue, epilogue, mission rewards)

Kill the first boss on the second level

Kill the second boss on the third level

Kill 10 enemies in the entire game

Kill 15 enemies in the entire game

Kill 20 enemies in the entire game

Kill 25 enemies in the entire game

Kill 30 enemies in the entire game

Successfully complete a mission with a gun

Successfully complete a mission with a machine gun

Successfully complete a mission with a revolver

Successfully complete a mission with a rifle

Make a headshot for the whole game 5 times

Make a headshot for the whole game 10 times

Make a headshot for the whole game 15 times

Make a headshot for the whole game 20 times